1501661655 has 48 divisors (see below), whose sum is σ = 2808108576. Its totient is φ = 737959680.

The previous prime is 1501661627. The next prime is 1501661659. The reversal of 1501661655 is 5561661051.

It is not a de Polignac number, because 1501661655 - 2⁶ = 1501661591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1501661659) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 380040 + ... + 383970.

It is an arithmetic number, because the mean of its divisors is an integer number (58502262).

Almost surely, 2^1501661655 is an apocalyptic number.

1501661655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1501661655 is a deficient number, since it is larger than the sum of its proper divisors (1306446921).

1501661655 is a wasteful number, since it uses less digits than its factorization.

1501661655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4608 (or 4605 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 1501661655 is about 38751.2793982341. The cubic root of 1501661655 is about 1145.1367799325.

The spelling of 1501661655 in words is "one billion, five hundred one million, six hundred sixty-one thousand, six hundred fifty-five".